Your trainer: Tight-in-the-abs and easy-on-the-eyes Joshua Lipsey, a fitness pro from Toronto who created the tummy-honing program TransCoremation ($150; C2CoreConcepts.com). The brilliance of his belly buffers: Unlike classic crunches, which target only the rectus abdominis (running from the center of your chest to your pubic bone), these moves work the transversus abdominis (deeper muscles that wrap around your trunk) as well as the obliques along your sides. Translation: a tinier waist, a flatter middle and sexy definition—fast!

Your plan: Add five ab-firming minutes a day to your workout, doing any combo of the six moves here. Or if you're in the mood for a flat-ab-athon, try this entire lineup.

Scissor Tap

Works: transversus and rectus abdominis, obliques

Lie on right side, right forearm propping up upper body, left arm raised and legs splayed wide with right leg in front (as shown). Engage abs to lift torso, keeping weight on right hip, and reach right hand to tap between shins. Return to start. Scissor legs so left is in front of right, and tap again for 1 rep. Do 15 reps. Switch sides; repeat.

Twist and Tighten

Works: transversus and rectus abdominis, obliques

Sit with feet planted, right hand on ground about a foot behind right hip, left hand on head, elbow out; lift hips. Hold tabletop pose as you bend torso and raise right knee to touch left elbow over midsection (as shown). Do 12 reps. Switch sides; repeat.

Super Cinching Sit-Up

Works: transversus and rectus abdominis, obliques

Lie faceup, arms overhead on ground. Engage abs as you sit up, bending knees and twisting torso to right as you extend arms past knees (as shown). Return to start. Repeat on opposite side for 1 rep. Do 20 reps.

Side Slim-Down

Works: obliques

Kneel on right knee with arms overhead and leaning toward left, left leg extended out to side, foot on ground (as shown). Shift to right, placing right hand on ground to support upper body, as you raise left leg level with hip, foot flexed. Return to start. Do 15 reps. Switch sides; repeat.

Beggar's Plank

Works: transversus and rectus abdominis, obliques

Start in plank position on forearms, palms down, feet together. Flip right palm up as you move right forearm forward a few inches; repeat on left (as shown). Reverse movement: Move left forearm back as you flip palm down; repeat on right to return to start for 1 rep. Do 15 reps.